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SUMMARY:The  Long-Term  Behaviour of Twin Tunnells - Richard Laver\, CUED
DTSTART:20100521T153000Z
DTEND:20100521T163000Z
UID:TALK23667@talks.cam.ac.uk
CONTACT:Zelda Stuck
DESCRIPTION:Deterioration of old infrastructure is a looming problem in de
 veloped countries\, and the Minnesota Bridge collapse warns of catastrophy
  if the problem is not addressed.  Worryingly though\, owners can only gue
 ss the condition of their infrastructure.  Long-term monitoring seems to o
 ffer more data\, but its interpretation is limited by the lack of knowledg
 e concerning how the structure changes with time.\n\nA prime example of ag
 eing infrastructure is seen in the oldest metro tunnels in the world: the 
 London underground system.  Its owners\, Tubelines\, are collaborating wit
 h the University of Cambridge to find out how to remediate these deteriora
 ting tunnels.  This seminar presents research addressing how to assess the
 se tunnels: by exploring how the tunnels change with time.\n\nThe research
  applies substantial 3D coupled-consolidation finite element analyses to e
 xplore how twin tunnels deteriorate.  New constitutive models for London C
 lay are proposed\, together with a successful simulation of a twin tunnel 
 construction in the heart of London.  Supplementary permeability tests on 
 fissured London Clay and unique grout specimens from the London undergroun
 d provide further insights into the long-term behaviour.\n
LOCATION:Engineering Department - LR6
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